Improvement in milk-can stoppers



waited gieten' @me can.

Lamm/ Patent No. 93,171, daad August 3, 1869.

IMPROVEMENT IN MILK-GAN sToPPSRs.

The Schedule' referred to in these Letters Patent and makingpart of the same. v

To all whom it may concern Be it known that I, JOHN M. BURGHARTT, of Great Bairingtomin the county of Berkshire, and State of Massachusetts, have invented a new and useful Improvement in Milk-Gan Stopper; and I do hereby declare that the following is a full, clear, and exact descrption thereof, which will enable others skilled in thejart to make and use the same, reference being had to theaccompanying drawings, forming,l1 part of this specification.

t This invention relates to a new and useful improve vment in Stoppers to milk-cans, whereby all motion in 'quence of the agitating or churning of the milk, in

the milk is prevented; and

The invention consists in the combination and arrangement of parts, as will be hereinafter fully described.

vIn the accompanying plate vof drawings- IFigure 1 represents avertical section of the stopper through the line :c z of iig.'2.

Figure 2 isa view ofthe bottom of the stopper.

Similar letters of reference indicate corresponding parts.

A is the oase of the stopper, which is packed on to the upper rim of the neck of the can, as seen at the point B.

-The can is seen in red color, and the stopper is fastened thereto by the detachable hooks O, (more or less in number.)

D is a piston, which works tight in the case, by means of elastic packing E, and is forced downward, by means of the spiral spring F, with a constant pressure.

G is a central tube through the stopper, and the piston is packed on this tube, as seen at H.

The tube G is closed at its upper end. .by means of a cap, I, which fits tightly overthe -tube by a screwthrcad or otherwise.

J is the top of the stopper, which is fast to the case A.

On the inside of the case A,'at its extreme bottom,

entirely filled, and 'thereap is replaced. Now, as thev piston allows no milk to pass it, (being tightly packed in the case,) i-t will be seen that there can be no motion of the milk within the can.

It is a fact well known to milkmen,.that`in consebeing taken to market, a very, great loss is sustained, as the tendency of the milk to souris much increased thereby.

The elastic piston D allows of the 'expansion vand contraction of the 'milk from the natural changes of the temperature, and still keeps the can entirely full. The perfect success of my stopper would votherwise be prevented, asa reduction of temperature would reduce'the bulk, and leave room for agitating or churnm gIhe piston adjusts itself to those variations, and leaves nothing to be desired in this respect.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- The combination ofthe piston D, provided with the packing E H, the spring F, and tube G, with. the case or neck A of a milk-can, all arranged substantially as herein shown and described, for the purpose specified.

The above specification of my invention signed by me, this 19th day of April,.1869.

Witnesses: JOHN M. BURGHARTT.

FRANK BLOGKLEY, ALEX. F. ROBERTS. 

